Detroit Locker and Detroit TrueTrac Owners

jsc7002 · **Posted:** Tue Nov 11, 2008 2:24 pm

I installed a DTT in my D30a and Im about to install a DL in my 8.25" but the guy I bought the DL from told me that you should use conventional gear oil not synethic gear oil for best operation from the differential. I am posting this because I did not know and Im going to guess there are others that didnt know about this.

just as a heads up for anyone with a DTT or DL

rangerd77 · **Joined:** Sat May 03, 2008 10:48 am **Posts:** 512

i have the DTT in my 8.25 and i use conventional. there something in the synthetic that the DTT or the DL doesnt like.

jsc7002 · **Posted:** Tue Nov 11, 2008 2:43 pm

ya thats what he was saying and I called Eaton/ Detroit this morning and they said the same thing to use conventional

now I have to change the fluids again :roll:

I hate to not be running synethic but Im not going to be able to in the diffs.

what gear oil do you use Rangerd77?

jsc7002 · **Posted:** Tue Nov 11, 2008 3:37 pm

will do, Im pretty excited to get it, I got an amazing deal on it too

Hood297 recently had a DL installed too, maybe he will chime in and give us an update on hows it doing for him

rangerd77 · **Joined:** Sat May 03, 2008 10:48 am **Posts:** 512

running the old Castrol 75 90, thats the best i think. i used to use it in my Supra and 911. never had a problem with them at all

Wasatch15 · **Joined:** Wed Jul 13, 2005 7:52 am **Posts:** 242

JSC7200.. let us know how you like the DL in the rear. I have the DTT in the 30A like you and was thinking of installing the DL in the rear too. I'd be interested to know what you find.

Thanks,
Ron

Fulltimer · **Posted:** Tue Nov 11, 2008 5:15 pm

I saw Hood297's in action on that trail ride and was impressed.

Terry

Hood297 · **Posted:** Tue Nov 11, 2008 5:35 pm

well I have had mine about a week now, and I love it. There were a few times i would have been stuck with out it on this past trail ride.

All the reviews i have read around the net have been good, but most have said it has terrible on road manners. They must have the older generation. It does pop every now and then about every (50-75 miles) it just sounds like you hit a bump, nothing extreme. and the steering is not too affected either.

It does unlock when not applying torque to it.

bottom line. for the money, its the best out there. Guaranteed performance.

RAYMAN975 · **Posted:** Tue Nov 11, 2008 6:07 pm

I HAVE THE DETROIT LOCKER NO-SPIN, AND I COULDNT BE HAPPIER, I HAVE HAD IT FOR ABOUT 6 MONTHS AND I LOVE IT! THE ROAD MANNERS ARE TO BE EXPECTED FROM 2 WHEELS BEING LOCKED TOGETHER, NOTHING BAD, I LOVE IT!

tjkj2002 · **Posted:** Tue Nov 11, 2008 9:11 pm

I always used 75w-90 or 75w-140 full synthetic in my front diff with my DTT and never had any issue and it always worked.Ran it for about 30,000miles with zero issues,changed the fliud 3 times in that period also and no metal flacks at all.

ATXKJ · **Posted:** Tue Nov 11, 2008 9:22 pm

DTT front & rear - synthetics ~30K - no problems.

JJsTJ · **Posted:** Tue Nov 11, 2008 10:18 pm

The factory manuals for those diffs say:

Quote:

Lubrication:
All NoSPIN differentials are designed to operate in those lubricants recommended by the vehicle/axle manufacturer. No special lubricant is
needed. For very cold weather applications, use the lightest oil the axle manufacturer will allow to overcome possible sluggish reengagement
of the driven clutch assemblies.

I used syn on another application w/ a full Detroit locker and never had any problems while racing or street driving for many miles.

Skyjump136 · **Joined:** Tue Jul 05, 2005 6:50 pm **Posts:** 1633

ATXKJ wrote:

DTT front & rear - synthetics ~30K - no problems.

Ditto that...no issues.

tommudd · **Posted:** Wed Nov 12, 2008 1:13 am

I have used full syn. before with a Detroit and never had a problem ????

jsc7002 · **Posted:** Wed Nov 12, 2008 1:51 am

I know Im using the Royal Purple synethic on my front DTT, but Im just telling you what Eaton/ Detroit told me, which is that they recommend using convential gear oil, because it will preform better with it.

ATXKJ · **Posted:** Wed Nov 12, 2008 11:39 am

JJ's quote was from Eaton/Detroit -

ask the guy who said 'conventional gear oil not synethic' where his data comes from.

KJ 119 · **Posted:** Wed Nov 12, 2008 9:52 pm

jsc7002 wrote:

will do, Im pretty excited to get it, I got an amazing deal on it too

Hood297 recently had a DL installed too, maybe he will chime in and give us an update on hows it doing for him

Gotta say,Hood's locker took care of business this weekend.Period.

Hood297 · **Posted:** Wed Nov 12, 2008 10:34 pm

KJ 119 wrote:

jsc7002 wrote:

will do, Im pretty excited to get it, I got an amazing deal on it too

Hood297 recently had a DL installed too, maybe he will chime in and give us an update on hows it doing for him

Gotta say,Hood's locker took care of business this weekend.Period.

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